if you want to move this bar with it's content just swap
Code:
<div class="line1">
...
</div>
with
Code:
<div class="line2">
...
</div>
in your skin1/customer/head.tpl
It is the easier way.
Another solution is to add into your main.css following rules:
Code:
#header .line2 {top:-69px}
#header .line1{top:39px}
I've checked it in Firefox, if you'll go this way you should test in every browser.
More complex is not to swap whole divs but it's content only and then swap in every .css file .line1 with .line2 and vice versa